Grate.



J. F. RDTHE.

GRA'IE.

APPLICATION FILED 00w. 3, 1910.

1,1 1 7,249, Patented Nov. 17, 1914.

2 SHEETS-SHEET 1 THE NORRIS PETERS CO.. PHOTO-LITHCL, WASHINGTON. D. r.-

J. F. ROTHE.

GRATE.

APPLICATION FILED OCT 3. 1910.

1,117,249. Y Patented Nov. 17, 1914.

2 SHEETS-SHEET 2.

$%% g a /WZ*Z N TED STATES PATENT ornroni.

. J'OSEPI-I F. ROTI-IE, 0F GREEN BAY, WISCONSIN.

GRATE.

1,117,249. Specification of Letters Patent. Patented N0 1'7, 1914b Application filed October 3, 1910. Serial N 0. 585,000.

To all whom it may concern:

Be it known that I, JOSEPH F. ROTHE, a citizen of the United States, residing at Green Bay, county of Brown, and State of \Visoonsin, have invented new and useful Improvements in Grates, of which the following is a specification.

My invention relates to improvements in furnace grates, and pertains especially to that class of grates known as shaking grates.

The object of my invention is to provide a form of grate which will shake out the ashes with maximum efficiency and which will be less likely to become clogged with clinkers than the ordinary grate.

In the following description, reference is had to the accompanying drawings, in which Figure 1 is a perspective view of a portion of a furnace bed with my invention applied thereto, and showing portions of the grate bars and the depending shaking arms at one end, the wall of the bed being partially broken away to expose such arms and the means for actuating them. Fig. 2 is a side view of one of the grate bars. Fig. 3 is a plan view of the same. Fig. 4: is a transverse sectional view, drawn on line mw of Fig. 2. Fig. 5 is a plan view of a portion of the shaker bar.

Like parts are identified by the same reference characters throughout the several views.

My improved grate is formed with a series of grate bars having a laterally curved sinuous web A, from which projections B extend on each side, these projections being in the form of laterally extending flanges or fins having upper surfaces Z) adapted to support the fuel, and preferably rounded to some extent outwardly and downwardly from the web A. The lower portion of each of these flanges B tapers inwardly to the web, as best shown at a in Fig. 4. Each of the grate bars is supported at its respective ends from bars 0 of the furnace bed frame, the grate bars having downwardly projecting point bearing members D loosely fitted to channel sockets E in the frame bars 0. The grate bar webs A are also providednear their respective ends with downwardly projecting arms F, whereby the grate bars may be oscillated upon said point bearing members D by meansof a shaker bar G and lever H.

Each of'the shaker bars G is provided with projections I adapted {to extend between the arms F of the grate bars. An auxiliary bar J is secured to the bar G by bolts K and bears upon the inner ends of the projections F, the bar J being on the opposite sides of the arms F of the grate bars from thatoccupied by the bar G. With this construction, it is obvious that the arms F are loosely received, not'only between the projections F, but between the bars G and J in such a manner-that when the lever H is oscillated upon its pivot bear mg K, the arms F will oscillate forwardly The bars G are mounted to slide in on the portions of the grate bar near the axis will have a simple oscillatory movement about said axis, the portions of the grate bar which are laterally 'oflset from such axis will lift upon one side and posi tively raise the body of fuel above such portions of the bar, while on the other side of the bar, the laterally. offset portions will be simultaneously depressed. It will also be observed that when any given portion of one grate bar is raised or depressed, the opposing portion of the adjacent bar will move in the opposite direction, these bars being thus rendered very effective for breaking up portions of the fuel which tend to coke or fuse together.

Y The curves of each of the grate bars should correspond with those of the adjacent bars, but it is not essential to my in vention whether the flanges or teeth B of one bar are directly opposite those of another bar or not. Preferably, however, theyare arranged with the teeth of flanges B. of one directly-opposing the respective teeth of the next bar. The specific form of the teeth is also not essential, although the form,

illustrated is preferred inasmuch as such teeth have great strength and while not likely to catch and hold clinkers between them, they exert great crushing power upon such clinkers as become caught between the teeth of one bar and those of the next.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

l. The grate bar comprising a sinuous web provided along its upper margin With integral laterally projecting flanges constituting teeth, and having the upper portion of said WGlO extended at each end and provided with depending rocker bearing projections adapted to support said bar, substantially as described.

2. A grate comprising the combination of a series of parallel sinuous curved bars, each provided with integral oppositely projecting flanges along its upper margin, and having its upper portion projected at each end, integral bearing members depending from the projecting end portions, integral operating arms depending from the lower portions of said Web near each end, supporting members having sockets to receive said bearing members, and a sliding shaker bar loosely engaging the operating arms, "substantially as described.

In testimony whereof I a'l'lix my signatm'e in the presence of two Witnesses.

JOSEPH F. ROTHE.

Witnesses 2 HENRY J. BULTMANN, GEO. J. DU Bois.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patentsv Washington, D. C. 

